﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace LiuLin.OQ2014.Extension
{
        public enum LogType
        {
            Info
            ,Error
        }

        public class LogHelper
        {
            public static string LogPath
            {
                get
                {
                    return AppDomain.CurrentDomain.BaseDirectory + @"\log";
                }
            }

            public enum LogLevel
            {
                Info,
                Error
            }

            public static void Info(string message, LogType logType = LogType.Info)
            {
                if (string.IsNullOrEmpty(message))
                    return;
                var path = string.Format(@"\{0}\", logType.ToString());
                WriteLog(path, "", message);
            }

            public static void Error(string message, LogType logType = LogType.Error)
            {
                if (string.IsNullOrEmpty(message))
                    return;
                var path = string.Format(@"\{0}\", logType.ToString());
                WriteLog(path, "Error ", message);
            }

            public static void Error(Exception e, LogType logType = LogType.Error)
            {
                if (e == null)
                    return;
                var path = string.Format(@"\{0}\", logType.ToString());
                WriteLog(path, "Error ", e.Message);
            }

            private static void WriteLog(string path, string prefix, string message)
            {
                path = LogPath + path;
                var fileName = string.Format("{0}{1}.log", prefix, DateTime.Now.ToString("yyyyMMdd"));

                if (!Directory.Exists(path))
                    Directory.CreateDirectory(path);

                using (FileStream fs = new FileStream(path + fileName, FileMode.Append, FileAccess.Write,
                                                      FileShare.Write, 1024, FileOptions.Asynchronous))
                {
                    byte[] buffer = System.Text.Encoding.UTF8.GetBytes(DateTime.Now.ToString("HH:mm:ss") + " " + message + "\r\n");
                    IAsyncResult writeResult = fs.BeginWrite(buffer, 0, buffer.Length,
                        (asyncResult) =>
                        {
                            var fStream = (FileStream)asyncResult.AsyncState;
                            fStream.EndWrite(asyncResult);
                        },

                        fs);
                    fs.Close();
                }
            }
        }

}
